This Big Bang Theory tshirt designed by Destro is worn by Sheldon Cooper in the TV show The Big Bang Theory. You can read on it : Feed The Pavlov's Dog. There's also a comic strip : a dog, a bell and a dog dish.

Pavlov is a scientist who tried to explain phobias. At the beginning of the 20th century, he made experiences with dogs to highlights how stimulus can lead to an automatic reflex of the body. Those experiments are great because they can explain how humans can be conditioned without even knowing it.

The Destro Tshirt - The Big Bang Theory Feed Pavlov's Dog is available in 6 sizes and 10 colors.